There Goes the NeighborhoodLos Angeles is having an identity crisis. City officials tout new development and shiny commuter trains, while longtime residents are doing all they can to hang on to home. The series is supported by the Conrad N. Hilton Foundation.

Today the Candidates, Tomorrow the Voters

Tomorrow is the biggest day in the history of presidential nominations. More than 20 states will hold caucuses and primaries for both Republicans and Democrats. We sample political capitals all over the country to get a sense of what's in store. Also, the Democratic race tightens while McCain surges, and comparing the Obama and Clinton healthcare proposals.

FROM THIS EPISODE

Tomorrow is the biggest day in the history of presidential
nominations. More than 20 states will hold caucuses and primaries for
both Republicans and Democrats. We sample political capitals all over
the country to get a sense of what's in store. Also, the Democratic race tightens while McCain surges, and
comparing the Obama and Clinton healthcare proposals.

Super Tuesday or Tsunami Tuesday amounts to a national primary, the first of its kind in American history. With just hours remaining before the biggest caucus and primary day in American history, presidential candidates are racing around the country. In both parties, they're competing for almost half the convention delegates needed for nomination, spread from big blue states to numerous red ones. We touch down in the Far West, Southwest, Midwest, the Deep South and the East Coast and hear how the war, the economy, healthcare and immigration are helping or hurting Democrats and Republicans. Will Super Tuesday be decisive for either party?

An average of eight national polls released since Friday shows Hillary Clinton leading Barack Obama with 44 to 42 percent and John MCain ahead of Mitt Romney 44 to 24 percent. John Mercurio is executive editor of the Hotline, the National Journal's daily political briefing.

"The principal policy division between Hillary Clinton and Barack Obama involves health care." That's the lead of Paul Krugman's column today in the New York Times. Krugman is a Princeton economist whose latest book is The Conscience of a Liberal. Harvard economist David Cutler, author of Your Money or Your Life: Strong Medicine for America's Health Care System, served on former President Clinton's Health Care Task Force, and he's now an advisor to Senator Obama.